SYLLABUS
GS-3: Conservation, environmental pollution and degradation.
Context: The UNEP–Climate and Clean Air Coalition (CCAC) has released Hidden Assets: The Economic and Health Case for Climate and Clean Air Action, the first comprehensive global economic assessment of integrated climate and clean-air action.
Key Findings of the Report
• Economic burden: South Asia has the highest current economic burden from air pollution among the 15 regions assessed, equivalent to around 10% of regional GDP.
• High benefit-cost ratio: Implementing the 25 solutions could generate around $21 in economic benefits for every $1 invested in South Asia, compared with around $15 globally.
• Avoided damages: The 25 solutions could avoid economic damages equivalent to around 4% of South Asia’s GDP by 2035, rising to 14.5% by 2100—the highest projected level among the 15 regions assessed.
• Near-term gains: The 21 clean-air and near-term climate solutions alone could deliver benefits exceeding 3% of South Asia’s GDP in 2035.
- Clean cooking and heating ranks first in 2035, followed by energy transformation for power generation and industrial-process emission standards.
• Changing priorities: By 2050, clean cooking and heating falls to fourth, with industrial-process emission standards, vehicle emission standards and energy transformation for power generation becoming more prominent. This reflects differences in the region’s energy system, pollution profile and development stage.
• Productivity gains: By 2050, avoided heat-related labour-productivity losses alone are estimated at around 2% of South Asia’s GDP.
Understanding the Climate–Air Pollution Nexus
• Common drivers: Climate change and air pollution share major sources, particularly fossil-fuel combustion, agricultural practices and industrial processes, with several pollutants contributing to both challenges.
• Super pollutants: Methane, black carbon and hydrofluorocarbons (HFCs) have important climate and air-quality linkages; reducing them can deliver rapid benefits alongside long-term CO₂ reduction.
• Compounding impacts: The two challenges together affect human health, ecosystems and economic activity, while heat stress and other climate impacts can further reduce labour productivity.
• Integrated gains: Tackling them together generates additional benefits through avoided climate damage, lower healthcare expenditure, higher labour productivity and improved quality of life.
- The assessment estimates an additional 0.2% of global GDP in benefits from integrated rather than separate action.
25 Solutions, Multiple Dividends
• Two-track package: The assessment evaluates 25 proven solutions comprising 4 long-term climate actions targeting deep CO₂ reductions and 21 clean-air and near-term climate solutions targeting super pollutants and rapid health and climate benefits.
• Energy & industry: Energy transformation for power generation, industrial energy efficiency, post-combustion controls, oil-and-gas emission reduction, coal-mine methane control, efficient brick kilns and industrial-process emission standards.
• Residential & transport: Clean cooking and heating, household energy transformation, stricter vehicle emission standards, vehicle inspection and maintenance, electric vehicles, cleaner non-road machinery and low-sulphur shipping.
• Agriculture, food & waste: Efficient fertiliser use, livestock and manure management, improved rice cultivation, reduced crop-residue burning, dietary changes, solid-waste and wastewater management.
• Other measures: Prevention of forest and peatland fires and further HFC phase-down. The solutions are designed to operate as a package, as their full synergistic benefits materialise only when pursued collectively.
Implications and Way Forward
• Reframe clean air: Air pollution should be treated as a macroeconomic and development risk, rather than merely an environmental or health concern.
• Integrate policymaking: Climate, air-quality, health and economic objectives should be embedded jointly in national growth plans, fiscal frameworks and investment strategies.
• Accelerate implementation: Siloed decision-making, weak enforcement, inadequate financing and poor coordination are major barriers; implementation delays average around 7.5–8 years globally, with institutional barriers the largest contributor.
• Invest in enabling conditions: Capacity building, air-quality monitoring, emissions inventories, institutional coordination, affordable finance and supportive infrastructure can accelerate implementation; every year of delay could forgo more than $1.5 trillion in global annual benefits.
• Prioritise strategically: South Asian countries should pursue the full package while sequencing interventions according to their energy systems, pollution profiles, development stages and costs, supported by appropriate finance, technology and capacity-building.